Life in a Whirl
As hurricanes and tornadoes, vortices are best avoided; but for many organisms they're richly rewarding.
by Steven Vogel
The Long Shot
What the world needs now, more than ever, is a good AIDS vaccine. Why don't we have one?
Golden Window on a Lost World
Tens of millions of years ago the residents of Carribean forest were trapped in glowing ribbons of resin. Today they're telling scientists what their world was like.
Blood Money
Why are French hemophiliacs dying of AIDS? Because French officials knowingly gave them tainted blood.